The destination datastore seems to be the only thing out of order
2013-01-17 07:42:57 -- debug: DST_DATASTORE_BLOCKSIZE: NA 2013-01-17 07:42:57 -- debug: DST_DATASTORE_MAX_FILE_SIZE: NA
You should not get "NA"s.
Check for a blocksize mismatch or filesystem problem on "DST_DATASTORE: ESXi-Backup"